"Colorado regulators approved groundbreaking controls on emissions from oil and natural gas operations after an unusual coalition of energy companies and environmentalists agreed on measures to counter worsening smog."

"Anadarko Petroleum Corp., Noble Energy Inc., and Encana Corp., among the state’s largest oil and gas producers, worked with the Environmental Defense Fund to craft regulations approved yesterday by the Colorado Air Quality Control Commission that would fix persistent leaks from tanks and pipes.

Emissions from oil and gas operations contribute to thickening smog that exceeds federal ozone guidelines along Denver’s picturesque backdrop of the Rocky Mountains. Such pollution includes methane, a source of climate-changing greenhouse gas. The haze prompted Governor John Hickenlooper to ask energy companies and environmentalists to come together to write the first-of-their-kind rules."